FUZE 8gb won't play thru a usb cable, goes into charge mode

Thanks for the comments Lyle. I guess because there was a USB connection on my FM transmitter and the only way the FUZE could connect to it that was was with IT’s cable  I thought it should play through it. This was a bad assumption on my part.  It plays great the the transmitter I just can’t use the remote for volume or switching songs. Thanks again.